Vise



Dec. 7, 1937. H. M. JOHNSTON VISE Filed Dec. 19, 1936 INVENTOR HOWARD M.JOHNSTON g M ATTORN Ey.

Patented Dec. 7, 1937 UNITED STATES PATENT OFFICE VISE ApplicationDecember 19, 1936, Serial No. 116,833

3 Claims.

This invention relates to a vise and more particularly to a vise havingmeans for shearing rivets from riveting members.

While a vise'of the character described may be applied to general uses,it is particularly well adapted for the replacement of sections on thecutting bar of mowing machines and the like. It is frequently necessary,during the use of such machines, to replace worn or damaged sections,and it has heretofore been difiicult for the user of the machine tocarry out such an operation without bending the bar or otherwiseinjuring the knife.

The invention will be described with reference to the accompanyingdrawing in which,

Figure 1 is an end elevation,

Figure 2 is a side elevation,

Figure 3 is a plan,

Figure 4 is an end view of an associated guide means and Figure 5 is aside view of the means shown in Figure 4.

In the drawing, I is the base member of the vise suitably anchored to abench l', 2 a fixed jaw at the end of the base adjacent the edge of thebench, 3 a movable jaw, having an elongated rear portion 3', slidablymounted on the base member and 4 a screw-threaded shaft adapted, bymeans of the handle 5, to open and close the jaws; all of which is knownconstruction.

The rivet removing construction of the present invention comprises twoessential elements, now to be described, one formed in the base member,the other on the inner end of the movable jaw section of the vice. Onthe base member is formed a shaped recess or the like to receive oneelement of the article, such as a mower knife, from which rivets are tobe removed while the other element lies fiat on the top face of the basemember. In or on the inner end of the movable jaw section there isformed an overhanging lip or like means to retain the article inposition for the deriveting operation.

As shown a plate 6 with a bearing face 6 and having a cut away portionor slot in its lower edge to provide an overhanging lip I is secured tothe inner end of the portion 3' of jaw 3. The overhanging lip might beformed directly in the jaw member but the arrangement shown provides foradjustment in case of wear. A shaped transverse slot 9 is formed in theupper face of the base I, and as shown is arranged to receive the barll) of a mower knife, while the cutter section ll, secured thereto byrivets l2, lies flat on the base. A bearing plate I3 may be removablyinserted in the slot 9 so that should the bearing surface wear it may bereadily renewed to insure accurate positioning of the knife or the like.

It will be observed that movement of jaw 3 causes the plate 6 to engagethe section II, with the lip I lying over the face thereof to hold it inposition, as shown in Figures 2 and 3 and further movement causes therivets to be clearly sheared OH and the section separated from the barwithout bending of the bar or other injury to either member.

A stop 8, which may be the head of an anchoring bolt, is preferablyprovided to insure against too much outward movement of jaw 3 and tothus protect the screw shaft from injury.

In some instances, the rear face of the cutting section H may be flushwith the back of knife bar It, and there is a consequent tendency of thebar to tilt during the deriveting operation. Means for preventing suchtilting is shown in Figures 4 and 5 and comprises a guide plate 20secured behind the shearing plate 6 and having depending portions 28' ateither side thereof carrying laterally extending flanges 2! adapted toextend under the knife bar 10, when the bearing face 6' has engaged thesection 1 l, as shown. Slots 22 in the guide plate 20 permit verticaladjustment of the plate for varying widths of knife bars.

Means for punching rivets from and for riveting articles may beprovided, and as shown in Figures 1 and 3 comprises a transverse raisedsection [3 formed on portion 3' of the jaw 3 and provided with aprojection I4 having a bore 15. A cut-away depression It in the sectionl3 forms a bearing for the article to be treated. By way of example amower knife guard I1 is shown in dotted lines in position in Figure 3and the ledger plate may be conveniently separated therefrom by punchingout rivet l8. The arrangement is also convenient for riveting sucharticles, the top surface of the section being provided with a lateralextension l9 to form an anvil and its elevation with respect to therearward extension of the jaw accommodating depending portions of theguard during the riveting operation.

I claim:

1. Device for shearing rivets in a pair of riveted members comprising abase having a transverse slot in its top face shaped to receive and holdone of said members whereby the other member rests flat upon the topface of said base, an element slidable on the top face of said base andhaving an overhanging lip adapted to engage the edge portion of saidother member, and means for preventing tilting movement of saidfirst-mentioned member during the rivet-shearing operation comprisingadjustable strips carried by said slidable element and depending oneither side of said base, said strips having flanges adapted to extendunder said first-mentioned member and closely adjacent thereto.

2. A device for shearing rivets in a mower cutting knife or the likewhich comprises a base forming one element in a vice, a transverse slotin the top face of the base to accommodate the bar of said knife withthe under face of a cutting section thereof resting on the top face ofsaid base on each side of said slot to prevent turning or twisting ofsaid knife, and an element slidable on the top face of said base andhaving an overhanging lip adapted to engage the edge portion of saidcutting section.

3. A device for shearing rivets in a mower cutting knife or the likecomprising a base forming one element of a vice, a narrow transverseslot in the top face of said base to receive the bar of said knife andpermit the under face of a cutting section thereof to rest on the topface of said base to prevent twisting or turning of the knife, a bearingplate in said slot, and an element slidable on the top face of said baseand having an overhanging lip adapted to engage the edge por tion ofsaid cutting section.

HOWARD MILTON JOHNSTON.

